FR2327972A1 - Procede pour la production de gypse hemihydrate du type alpha - Google Patents

Procede pour la production de gypse hemihydrate du type alpha

Info

Publication number
FR2327972A1
FR2327972A1 FR7631121A FR7631121A FR2327972A1 FR 2327972 A1 FR2327972 A1 FR 2327972A1 FR 7631121 A FR7631121 A FR 7631121A FR 7631121 A FR7631121 A FR 7631121A FR 2327972 A1 FR2327972 A1 FR 2327972A1
Authority
FR
France
Prior art keywords
production
hemihydrate gypsum
alpha type
alpha
type
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7631121A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kureha Corp
Original Assignee
Kureha Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kureha Corp filed Critical Kureha Corp
Publication of FR2327972A1 publication Critical patent/FR2327972A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/466—Conversion of one form of calcium sulfate to another
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/02—Methods and apparatus for dehydrating gypsum
    • C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
FR7631121A 1975-10-17 1976-10-15 Procede pour la production de gypse hemihydrate du type alpha Withdrawn FR2327972A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50124313A JPS5248594A (en) 1975-10-17 1975-10-17 Method for producing type gypsum hemihydrate

Publications (1)

Publication Number Publication Date
FR2327972A1 true FR2327972A1 (fr) 1977-05-13

Family

ID=14882227

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7631121A Withdrawn FR2327972A1 (fr) 1975-10-17 1976-10-15 Procede pour la production de gypse hemihydrate du type alpha

Country Status (6)

Country Link
US (1) US4091080A (fr)
JP (1) JPS5248594A (fr)
CA (1) CA1074977A (fr)
DE (1) DE2646347B2 (fr)
FR (1) FR2327972A1 (fr)
GB (1) GB1561269A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570367A1 (fr) * 1984-09-17 1986-03-21 Kureha Chemical Ind Co Ltd Procede pour la production d'hemihydrate de gypse sous forme a

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2011363B (en) * 1977-12-29 1982-07-14 Idemitsu Kosan Co Production of calcium sulphate
DE2803764C2 (de) * 1978-01-28 1983-02-10 Saarbergwerke AG, 6600 Saarbrücken Verfahren zur Reinigung von Kohlefeuerungsabgasen
JPS5697548A (en) * 1980-01-09 1981-08-06 Mitsubishi Heavy Ind Ltd Preparation of catalyst containing metal as base material
EP0044005B1 (fr) * 1980-07-14 1984-09-26 HIS Handels- und Industriebedarf GmbH Préparation de gypse hémihydraté par usage de chaleur d'échappement, d'acide sulfurique aqueux et de sels sulfuriques
US5248487A (en) * 1987-03-21 1993-09-28 Jorg Bold Process for the conversion of calcium sulfate dihydrate into alpha-hemihydrate
DE3819652C3 (de) * 1987-05-22 1996-08-01 Pro Mineral Ges Verfahren zur Erzeugung von als Baustoff geeignetem Calciumsulfat-Alphahalbhydrat aus feuchtem, feinteiligem Rauchgasentschwefelungsgips und seine Verwendung
EP0666776B1 (fr) 1992-10-28 1996-08-14 AlliedSignal Inc. Convertisseur catalytique comprenant un monolithe metallique a catalyseur incorpore
US5562892A (en) * 1995-01-26 1996-10-08 Kirk; Donald W. Process for the production of alpha hemihydrate calcium sulfate from flue gas sludge
DE59802498D1 (de) * 1997-05-10 2002-01-31 Sicowa Verfahrenstech Verfahren zum Herstellen von Calciumsulfat-Alphahalbhydrat
US6652825B2 (en) 2001-05-01 2003-11-25 National Gypsum Properties Llc Method of producing calcium sulfate alpha-hemihydrate
US6964704B2 (en) * 2003-03-20 2005-11-15 G.B. Technologies, Llc Calcium sulphate-based composition and methods of making same
JP4075709B2 (ja) * 2003-07-02 2008-04-16 住友電装株式会社 コネクタ
US7273579B2 (en) * 2004-01-28 2007-09-25 United States Gypsum Company Process for production of gypsum/fiber board
US7588634B2 (en) * 2006-09-20 2009-09-15 United States Gypsum Company Process for manufacturing ultra low consistency alpha- and beta- blend stucco
MX2011001116A (es) 2008-07-31 2011-05-23 Yoshino Gypsum Co Proceso para la modificacion continua de yeso dehidratado y yeso dihidratado modificado obtenido mediante el proceso.
EP2163532A1 (fr) * 2008-09-11 2010-03-17 Claudius Peters Technologies GmbH Procédé et installation destinés à la fabrication de plâtre dur
CN117303427B (zh) * 2023-09-26 2024-05-03 武汉工程大学 一种利用α半水石膏晶种制备高强α半水石膏的方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2006342A (en) * 1934-05-18 1935-07-02 Krebs Pigment & Color Corp Process of making anhydrite
US2316343A (en) * 1937-12-29 1943-04-13 Kubelka Paul Manufacture of calcium sulphate
DE1157128B (de) * 1962-05-25 1963-11-07 Giulini Ges Mit Beschraenkter Verfahren zur Herstellung von ª‡-Calciumsulfat-Halbhydrat aus synthetischem Calciumsulfat-Dihydrat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570367A1 (fr) * 1984-09-17 1986-03-21 Kureha Chemical Ind Co Ltd Procede pour la production d'hemihydrate de gypse sous forme a
US4842842A (en) * 1984-09-17 1989-06-27 Kureha Kagaku Kogyo Kabushiki Kaisha Process for producing α-form gypsum hemihydrate

Also Published As

Publication number Publication date
GB1561269A (en) 1980-02-20
US4091080A (en) 1978-05-23
DE2646347A1 (de) 1977-05-05
JPS5422955B2 (fr) 1979-08-10
JPS5248594A (en) 1977-04-18
DE2646347B2 (de) 1978-10-19
CA1074977A (fr) 1980-04-08

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Legal Events

Date Code Title Description
ST Notification of lapse